Apparatus for enlarging ajutages of metal tubes.



No. 656,425. Patented Aug. 2|, I900.

(Application filed Oct. 2, 1899.

(No Model.) 2 Sheets$haet Wm MW,

THE NORRIS Pzrsas co. PHOTO-LYING WASHINGTON, a, c,

No. 656,425. Patented Aug. g1, I900.

F. SCHILLING 8L J. SCHURZ.

APPARATUS FOR ENLAR HING AJUTAGES 0F METAL TUBES.

(Application filed Oct. 2, 1899.) (No Model.) 2 Shaets8heat 2.

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i U I E STATES PATENT OFFICE.

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AlUTAG ES 0F METAL TUBES.

. SPECIFICATION forming part ofLetters latent No. 656,425, dated August21, 1900.

Applio ation filad October 2, 1899.

TodZZ whom iz'z may concern: Beit known that we, FRITZ SCHILLING andJOHANN. SCHURZ, mechanicians, subjects of the King of Bavaria,residingat Nuremberg, Seuffertstrasse 10, in the Kingdom of Bavaria and GermanEmpire, have invented certain new and useful Improvements in Apparatusfor Enlarging Ajutages of Metal Tubes; and we do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

This invention relates to devices for enlarging and calibrating metalajutages from the conical form in which they are originally produced onmetaltubes; audit consists in the apparatus hereinafter described, andshown in the accompanying drawings, in which Figure lis an elevation ofthe complete apparatus embodying our invention; Fig. 2, a sectionaldetail showing the enlarging or calibrating tool entering the aj utagein axial line; Fig. 3, a like detail showing said tool in a moreadvanced positionof action with the ajutage practicallycalibrated; Fig.4, an enlarged section onthe line 4 4 of Fig. 1, and Fig. 5 a likesection on the line 5 5 of Fig. 1. Between bearings a is a pulley a,mounted on and driving a shaft b, which is capable of longitudinaladjustment. At one end of this shaft is a box or socket c, in which ispivoted the carrier of the calibrating-tool d, hereinafter termed the jexpander. The working end of the expander is conical, the acuteness ofthe cone depending upon the diameter to which the ajutage is to becalibrated. The angular heel d of the expander extends lengthwise of thebox and is pressed outward by a spring, as shown, so that the expandertends normally to assume a position in axial line with the shaft.Embracing the end of the shaft and the tool-carrier is a sliding collare, which when in position over the pivot of the carrier, as indicated inFig. 2, serves, in conjunction with the box and the spring, to hold theexpander in said "axial position, but when slid back throws the expanderout of said axial line to a degree depending upon the distance to whichthe collar is moved. This collar is shifted lengthwise of the shaft bymeans of a hand-lever e, pivoted upon Serlhlllo. 732,374. aromas.

in lugs from the bed-plate F. Thehandaffixed to said sleeve f, and inthe slot of which is placed an adjustable stop g, which may be settoward or from the hand-lever.

of the heel cl'of the expander, forced outward by the spring, will atfirst cause the sleeve or collar 0 to be carried along with it, swingingthe hand-lever around until it comes in con tact with the stop gwhichwill be so set as to contact with the lever at the moment that thelateralmovement of the expander should begin to take place. Thereafterthe further advance of shaft 19 and expander will cause the collar 6" totravel relatively backward over the heel d, swinging the expanderoutward. The shaft 17 is moved lengthwise bya second hand-lever h,suitably pivoted. As alreadystated, a box 0 is formed at one end of theshaft in which the expanding tool is pivoted. This box may beenlargedover the regular diameter of the shaft, asshown in Figs. 1 and 5, toafford shoulders 9 behind which a peripherally-grooved collar 9 isarranged to'slide longitudinally on the shaft. This collar is embracedby a yoke from the bracket 9, so that when the shaft is projected itwill move relatively back therealong, but when retracted will comeagainst the shoulders and serve as a stop. it

The metal tube a, with the ajutage z" of conical form, is laid beforethe rotating expander d, as indicated in dotted lines in Fig. 2, and theshaft is then fed up toward it by means of the hand-lever 7b, carryingwith it the axiall y-disposcd expander,which pierces and distends it ina right line until the mouth is sufficiently opened, when, according tocircumoperated to throw the expander gradually from the positionrepresented in full lines in said figure to that shown in Fig. 3, or thestop 9 may be so setas to accomplish this result concurrently with thegradual penetration. When the expander has fully calibrated the ajutage,the work is stopped and the shaft is retracted into position for asucceeding operation.

We claim-- 1. The combination of the longitudinally sleeve f, which isfixed upon rod f,he1d fast adjustable rotating shaft, the tool-carrierlever moves overthe slotted bracket g, rigidly N ow if the shaftb beprojected the resistance stances, the hand-lever may be manually withits angular heel pivoted in the end thereof, the conicalcalibrating-expander carried thereby, the spring acting on the heel ofthe a of, the conical calibrating-expander carried thereby, the springacting on the heel of the v expander to force it toward an axialposition, I 5

the sliding collar arranged to'hold the expander in axial line with theshaft during its incipient entering and spreading movement, a hand-leverfor shifting said collar, and a stop adjustable tolimit the movement ofsaid hand- 20 lever under the forward play of the shaft.

In'testimony whereof we aflix our signatures inpresence oftwo'witnesses.

FRITZ SCHILLING. JOHANN SOHURZ.

Witnessesz' p p v A X WIELE,

MAX SCHNEIDER.

